Free Online Excel to CSV Converter
Transform your .xlsx, .xls, .xlsb, .xlsm, and .ods spreadsheet files into clean, portable CSV data with just a few clicks. Simply drag a file into the workspace or upload it from your computer to see a spreadsheet-style preview on the left while the CSV output generates instantly on the right. If you are working with multi-sheet workbooks, the sheet selector makes it easy to choose exactly which tab to process. Since everything happens locally in your browser, your sensitive data never leaves your device.
Excel to CSV
Easily convert any Excel spreadsheet to standard CSV with automatic quoting for fields that contain commas or newlines.
Excel to JSON
Convert spreadsheet rows into a structured JSON array, featuring automatic type detection for numbers and booleans.
Excel to TSV
Export your data as tab-separated values to simplify pasting into Google Sheets or various database tools.
Sheet Viewer
See every tab in a multi-sheet workbook at a glance with row counts and data samples for quick inspection.
Column Counter
Get a detailed audit of your workbook, including counts for rows, columns, and empty cells on every sheet.
Excel to Markdown
Create GitHub Flavored Markdown tables from your data, perfect for READMEs, wikis, and documentation.
Online Excel to CSV Converter with Spreadsheet Preview and Multi-Sheet Support
The split-pane workspace keeps your original data visible as an interactive table while showing the converted results side by side. You can scan your rows easily thanks to the familiar spreadsheet layout, featuring sticky column headers and alternating row colors. If you need more room on one side, just use the resizable drag handle to adjust the panels. The top info bar provides a clear view of your workbook structure, including row counts and a sheet selector for multi-tab files, ensuring you have full control before downloading the final output.
Upload and Convert in Seconds
Getting your spreadsheet into the converter takes just a click or a drag. Click Upload Excel File to browse your computer, or drag and drop the file directly onto the workspace. The parser loads the SheetJS library on demand, reads the file using the browser File API, and displays both the table preview and converted output within seconds. Supported formats include .xlsx, .xls, .xlsb, .xlsm, .ods, and even plain .csv files, so the tool handles virtually any spreadsheet format you encounter.
RFC 4180 Compliant CSV Output
The output follows strict RFC 4180 standards, ensuring your CSV is compatible with almost any platform. Fields with commas are automatically wrapped in double quotes, while internal quotes are escaped and newlines are preserved. You can import these files directly into databases or analytics tools without worrying about formatting errors or manual cleanup.
Convert Excel to JSON, TSV, and Markdown
The workspace offers five more ways to analyze and convert your data beyond standard CSV. You can turn your rows into a JSON array of objects where the first row acts as keys, complete with automatic type detection for numbers and booleans. If your data contains too many commas, the TSV option provides tab-separated values to avoid quoting issues. For documentation work, the Markdown generator creates tables formatted perfectly for GitHub READMEs, Notion pages, or Obsidian notes.
Preview Every Sheet in Your Workbook
Quickly inspect multi-tab files with the Sheet Viewer, which displays the sheet name, row count, and a 50-row sample for every part of your workbook. This preview saves you the trouble of opening a full spreadsheet application just to find the right data before you start your conversion.
Audit Your Spreadsheet with Column Counter
Verify your dataset's integrity using the Column Counter to get detailed reports on row and column totals, cell counts, and empty fields across every sheet. Running this audit helps you spot missing data or structural gaps before you import the results into a database or a processing pipeline.
Your Excel Files Stay Private in Your Browser
Privacy is a core feature of this workspace, where every tool processes your spreadsheets entirely within your browser. By using the SheetJS parser and the browser File API, the converter reads your files directly from your disk without transmitting a single byte to a server. Your data is never stored or logged, and once you close the tab, everything is gone. With no accounts to create and no backend file limits, you can safely process sensitive business reports or personal records with total peace of mind.
Related Excel and Data Tools
These tools complement the Excel to CSV Converter for broader data processing tasks:
- CSV to JSON -- convert CSV to JSON, validate CSV, convert to TSV, HTML Table, Markdown, and SQL
- CSV to Multiline -- split CSV values into separate lines, extract columns, and filter rows
- CSV to HTML Table -- convert CSV data into styled HTML table markup
- JSON Formatter -- format, minify, validate, and transform JSON data
- Text Compare -- compare two text inputs side by side
- Word Counter -- count words, characters, sentences, and paragraphs